关键词: 永磁同步电机, 无传感器控制, 滑模观测器, 稳态卡尔曼滤波

Abstract:

Sliding model observer (SMO) was adopted to estimate the rotor position and rotor speed of permanent magnetic synchronous motor (PMSM) so as to achieve its sensorless control. An improved SMO was presented, and steady-state extended Kalman filter (SSEKF) was plugged into the SMO,so that the chattering can be diminished quickly and effectively.Compared with the conventional filter of phase-loop lock, SSEKF can achieve higher accuracy and faster response.As the Kalman gain matrix is set as constant, SSEKF is not time-consuming.Simulation and experimental results show SMO combined with SSEKF can obtain cleaner back-EMF, and the position error is smaller.

Key words: permanent magnet synchronous motor (PMSM), sensorless control, sliding model observer (SMO), steady-state extended Kalman filter (SSEKF)